Listing Type/Attributes Not Working

I’m having two major problems, possibly related. Would someone be able to help me troubleshoot?

1. I can’t seem to create new attributes. When I select the “Attributes” section in my WordPress menu, I can enter the Title, Name, Affix and can choose an icon or image. But when I click “Create,” the attribute doesn’t appear to be saved and I can’t use it. Similarly, when I try to edit a listing type and add new attributes that way, once I update the listing type the attribute doesn’t appear under “All available attribute.” The listing types imported from the demo do not have attributes, and neither do the categories imported from the demo.

2. When creating a new listing, I can’t select a listing type. I am able to create listing types, but I can’t assign my listings to them. When creating a new listing, I’m able to title the listing and select a featured image, category and region. When I scroll down to “Listing Manager” and select a Listing Type from the dropdown menu and then save the page, the listing type is not saved and “Listing Manager” still asks me to select a listing type. Because of this, I can’t assign any of my listings to a listing type. The listings imported from the demo also do not have a listing type assigned to them, so whenever I open a listing type page (such as Cars or Buildings), no listings display.

I have already updated my permalinks to “Post Name” and tried disabling plugins and still can’t figure out why this is happening. Any help would be much appreciated! Thanks!